Malware Analysis Report

2024-10-19 06:15

Sample ID 220220-jympysbdej
Target 413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7
SHA256 413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7
Tags
ryuk persistence ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7

Threat Level: Known bad

The file 413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7 was found to be: Known bad.

Malicious Activity Summary

ryuk persistence ransomware

Ryuk

Executes dropped EXE

Loads dropped DLL

Deletes itself

Checks computer location settings

Adds Run key to start application

Drops file in Program Files directory

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-02-20 08:04

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-02-20 08:04

Reported

2022-02-20 09:20

Platform

win7-en-20211208

Max time kernel

168s

Max time network

44s

Command Line

"C:\Windows\system32\Dwm.exe"

Signatures

Ryuk

ransomware ryuk

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\users\Public\LCDyJ.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\users\Public\LCDyJ.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\reg.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\users\\Public\\LCDyJ.exe" C:\Windows\system32\reg.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\features\org.eclipse.emf.common_2.10.1.v20140901-1043\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\SKY\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.diagnostic.zh_CN_5.5.0.165303.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\modules\locale\com-sun-tools-visualvm-sa_ja.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\America\St_Johns C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\Etc\GMT-9 C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\locale\ast\LC_MESSAGES\vlc.mo C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\SpecialOccasion\NavigationUp_SelectionSubpicture.png C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Argentina\Rio_Gallegos C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\Full\1047x576black.png C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\core\com-sun-tools-visualvm-modules-startup.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Cambridge_Bay C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\profiler\modules\locale\org-netbeans-modules-profiler-snaptracer_zh_CN.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Cayenne C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\Pacific\Norfolk C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\locale\ta\LC_MESSAGES\vlc.mo C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.console.ui_5.5.0.165303.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.apache.jasper.glassfish_2.2.2.v201205150955.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-openide-nodes.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\deploy\messages_zh_HK.properties C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\Etc\GMT+3 C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Microsoft Games\Multiplayer\Checkers\de-DE\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\include\jvmticmlr.h C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Warsaw C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-swing-plaf.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jre7\lib\zi\Asia\Jerusalem C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\VideoLAN\VLC\plugins\packetizer\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\Rectangles\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.equinox.p2.reconciler.dropins.nl_zh_4.4.0.v20140623020002.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\profiler\modules\locale\org-netbeans-modules-profiler-selector-ui_ja.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-swing-tabcontrol.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\org-openide-compat.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\Office Setup Controller\Publisher.en-us\PublisherMUI.XML C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\com.jrockit.mc.console.ui.notification_5.5.0.165303\html\dcommon\gifs\rarrow.gif C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-api-progress_zh_CN.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\config\Modules\org-openide-compat.xml_hidden C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Microsoft Games\Mahjong\es-ES\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\Accessibility.api C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Antigua C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Argentina\La_Rioja C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Beirut C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\Office Setup Controller\Publisher.en-us\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\COMPASS\THMBNAIL.PNG C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\GRPHFLT\MS.EPS C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\SONORA\THMBNAIL.PNG C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\TRANSLAT\ARFR\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Africa\Maputo C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\America\Fortaleza C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Resource\ENUtxt.pdf C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\Help\1040\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\visualvm\update_tracking\com-sun-tools-visualvm-charts.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\locale\org-netbeans-modules-editor-mimelookup_ja.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\org-netbeans-modules-keyring-impl.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\update_tracking\org-openide-text.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\etc\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\Modules\org-netbeans-modules-keyring.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Adobe\Reader 9.0\Reader\plug_ins\DigSig.api C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\WATER\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\THEMES14\WATER\WATER.INF C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Common Files\Microsoft Shared\ink\fsdefinitions\main\base_jpn.xml C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\BabyGirl\16_9-frame-highlight.png C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\missioncontrol\plugins\org.eclipse.emf.ecore.xmi_2.10.1.v20140901-1043.jar C:\Windows\system32\taskhost.exe N/A
File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\modules\RyukReadMe.txt C:\Windows\system32\taskhost.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\users\Public\LCDyJ.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\users\Public\LCDyJ.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1796 wrote to memory of 520 N/A C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe C:\users\Public\LCDyJ.exe
PID 1796 wrote to memory of 520 N/A C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe C:\users\Public\LCDyJ.exe
PID 1796 wrote to memory of 520 N/A C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe C:\users\Public\LCDyJ.exe
PID 1796 wrote to memory of 520 N/A C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe C:\users\Public\LCDyJ.exe
PID 520 wrote to memory of 640 N/A C:\users\Public\LCDyJ.exe C:\Windows\System32\cmd.exe
PID 520 wrote to memory of 640 N/A C:\users\Public\LCDyJ.exe C:\Windows\System32\cmd.exe
PID 520 wrote to memory of 640 N/A C:\users\Public\LCDyJ.exe C:\Windows\System32\cmd.exe
PID 520 wrote to memory of 1276 N/A C:\users\Public\LCDyJ.exe C:\Windows\system32\taskhost.exe
PID 520 wrote to memory of 1376 N/A C:\users\Public\LCDyJ.exe C:\Windows\system32\Dwm.exe
PID 520 wrote to memory of 640 N/A C:\users\Public\LCDyJ.exe C:\Windows\System32\cmd.exe
PID 640 wrote to memory of 1472 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\reg.exe
PID 640 wrote to memory of 1472 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\reg.exe
PID 640 wrote to memory of 1472 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\reg.exe

Processes

C:\Windows\system32\Dwm.exe

"C:\Windows\system32\Dwm.exe"

C:\Windows\system32\taskhost.exe

"taskhost.exe"

C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe

"C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe"

C:\users\Public\LCDyJ.exe

"C:\users\Public\LCDyJ.exe" C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\LCDyJ.exe" /f

C:\Windows\system32\reg.exe

REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\LCDyJ.exe" /f

Network

N/A

Files

memory/1796-54-0x0000000076C61000-0x0000000076C63000-memory.dmp

C:\Users\Public\LCDyJ.exe

MD5 c5609ab395ee733f889c28d9f93f2af3
SHA1 ee4099fc9381c45aaa32505521a8dbc1daf3ff78
SHA256 1659503da5d0318c6025ea87b125b4917d53f4f666461b42d7cc2552ac2b3992
SHA512 39fa80bc077b24b1f8814b19722613b472343dded1fd14b1231e11a6b03c2ae477db2f787a4f2d72b39b611c2070ad833068e2e01fd18e9cab257414e2ce1caf

\Users\Public\LCDyJ.exe

MD5 c5609ab395ee733f889c28d9f93f2af3
SHA1 ee4099fc9381c45aaa32505521a8dbc1daf3ff78
SHA256 1659503da5d0318c6025ea87b125b4917d53f4f666461b42d7cc2552ac2b3992
SHA512 39fa80bc077b24b1f8814b19722613b472343dded1fd14b1231e11a6b03c2ae477db2f787a4f2d72b39b611c2070ad833068e2e01fd18e9cab257414e2ce1caf

memory/520-57-0x000007FEFC321000-0x000007FEFC323000-memory.dmp

memory/1276-58-0x000000013F5B0000-0x000000013F93A000-memory.dmp

memory/1276-61-0x000000013F5B0000-0x000000013F93A000-memory.dmp

memory/640-62-0x000000013F5B0000-0x000000013F93A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-02-20 08:04

Reported

2022-02-20 09:19

Platform

win10v2004-en-20220113

Max time kernel

46s

Max time network

124s

Command Line

C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\users\Public\eTvVE.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation C:\users\Public\eTvVE.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\reg.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\users\\Public\\eTvVE.exe" C:\Windows\system32\reg.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\users\Public\eTvVE.exe N/A
N/A N/A C:\users\Public\eTvVE.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\users\Public\eTvVE.exe N/A

Processes

C:\Windows\system32\DllHost.exe

C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc

C:\Windows\system32\taskhostw.exe

taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc

C:\Windows\system32\sihost.exe

sihost.exe

C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe

"C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe"

C:\users\Public\eTvVE.exe

"C:\users\Public\eTvVE.exe" C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\eTvVE.exe" /f

C:\Windows\system32\reg.exe

REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\eTvVE.exe" /f

Network

Country Destination Domain Proto
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp
US 8.8.8.8:53 crl4.digicert.com udp
US 93.184.220.29:80 crl4.digicert.com tcp
US 93.184.220.29:80 crl4.digicert.com tcp

Files

C:\Users\Public\eTvVE.exe

MD5 c5609ab395ee733f889c28d9f93f2af3
SHA1 ee4099fc9381c45aaa32505521a8dbc1daf3ff78
SHA256 1659503da5d0318c6025ea87b125b4917d53f4f666461b42d7cc2552ac2b3992
SHA512 39fa80bc077b24b1f8814b19722613b472343dded1fd14b1231e11a6b03c2ae477db2f787a4f2d72b39b611c2070ad833068e2e01fd18e9cab257414e2ce1caf

C:\users\Public\eTvVE.exe

MD5 c5609ab395ee733f889c28d9f93f2af3
SHA1 ee4099fc9381c45aaa32505521a8dbc1daf3ff78
SHA256 1659503da5d0318c6025ea87b125b4917d53f4f666461b42d7cc2552ac2b3992
SHA512 39fa80bc077b24b1f8814b19722613b472343dded1fd14b1231e11a6b03c2ae477db2f787a4f2d72b39b611c2070ad833068e2e01fd18e9cab257414e2ce1caf

memory/2288-133-0x00007FF601DA0000-0x00007FF60212A000-memory.dmp

memory/764-134-0x00007FF601DA0000-0x00007FF60212A000-memory.dmp